and the girls, sasha and malia. what a difference four years makes in the lives of these young women. >>> and now i want to bring in our chief white house correspondent jonathan karl. >> reporter: well, that's right. that was the big, the lofty, the ambitious today. tomorrow, reality comes back. the president, if you looked at that stage, it's the people that hold the key for his second term agenda. over his right shoulder, speaker john boehner. it is boehner that can stop the president's agenda dead in its tracks. all of the president's priorities including gun control, combatting climate change, ultimately must go through a republican-controlled house that is led by boehner, to get anything passed. he must find a way to work with boehner, despite deep political differences on the very issues that the president wants to pursue. and it's not just the house. there are also pro-oil, pro-gun democrats who can stymy the president's agenda in the senate. that brings us to joe biden. you might consider him the president's